—Have you decided where to spend your summer holiday?
—Not yet. We _________ go to Qingdao.
A. must B. should C. need D. may
_____ people are waiting to watch the raising of the national flag at Tian’an Men Square.
A. Hundred B. Thousand C. Two hundreds D. Thousands of
The new library building _____ last week.
A. was completed B. is completed C. completed D. has completed
—Did you call Sara back?
—I didn’t need to, _____ we’ll have a meeting together tonight.
A. though B. unless C.. because D. if
Keep practicing and you _____ your English.
A. improve B. will improve C. improved D. were improving
The air in mountain areas is ____ that in big cities.
A. as fresh as B. fresher than C. as dirty as D. dirtier than
